2051231403 has 16 divisors (see below), whose sum is σ = 2946325760. Its totient is φ = 1261881504.

The previous prime is 2051231401. The next prime is 2051231411. The reversal of 2051231403 is 3041321502.

It is not a de Polignac number, because 2051231403 - 2¹ = 2051231401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051231403.

It is not an unprimeable number, because it can be changed into a prime (2051231401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147108 + ... + 160446.

It is an arithmetic number, because the mean of its divisors is an integer number (184145360).

Almost surely, 2^2051231403 is an apocalyptic number.

2051231403 is a deficient number, since it is larger than the sum of its proper divisors (895094357).

2051231403 is a wasteful number, since it uses less digits than its factorization.

2051231403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17298.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2051231403 is about 45290.5222204381. The cubic root of 2051231403 is about 1270.5883984801.

Adding to 2051231403 its reverse (3041321502), we get a palindrome (5092552905).

Subtracting 2051231403 from its reverse (3041321502), we obtain a palindrome (990090099).

It can be divided in two parts, 20512 and 31403, that added together give a palindrome (51915).

The spelling of 2051231403 in words is "two billion, fifty-one million, two hundred thirty-one thousand, four hundred three".